英文關鍵字
waterfall
fall
water
nature
river
outdoor
edge
landscape
scenic
environment
travel
canada
cascade
cliff
flowing
powerful
wet
niagara
beauty
blue
tourism
view
america
mist
spray
stream
person
background
beautiful
stone
fast
flow
horizontal
movement
moving
power
scenery
rock
green
landmark
mountain
natural
falls
bubbling
whirlpool
waves
foam
foamnatural
strong